“THATCHY” is a valid word. — 18 points Scrabble

hatchthe production of young from an egg
yachtan expensive vessel propelled by sail or power and used for cruising or racing
cattyany of various units of weight used in southeastern Asia (especially a Chinese measure equal to 500 grams)

acta legal document codifying the result of deliberations of a committee or society or legislative body
catfeline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats
hatheaddress that protects the head from bad weather; has shaped crown and usually a brim
thy
hah
yah
haygrass mowed and cured for use as fodder
tattastelessness by virtue of being cheap and vulgar
att
caya coral reef off the southern coast of Florida

ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
ah
ha(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
ya
ay
taa hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite

THATCHY